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Simulation approach and causality evaluation for an active noise control system

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2 Author(s)
H. Janocha ; Lab. for Process Autom., Saarlandes Univ., Saarbrucken, Germany ; B. Liu

An approach to simulate the performance of an active noise control system is proposed. The simulated result is shown to be a good approximation to that of a real system. By means of this approach some examples which may not be easily realisable in practical implementations are studied. Results concerning causality and filtered-x-type algorithms are interesting. Simulations show that the investigated active noise control system needs a considerable causality margin to perform well. This is explained by the inverse modelling nature of the selected feedforward controller. An example of the delayed inverse modelling of a nonminimum-phase system is given in which the quality of the inverse modelling depends on the delays

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IEE Proceedings - Control Theory and Applications  (Volume:145 ,  Issue: 4 )